http://www.isa.org/InTech/20070501
"Last year, ISA ran a survey requesting end users to answer questions related
to their potential use of wireless technology for industrial automation.
One users response made a statement that may reflect a general attitude of
many potential users. Here is the slightly edited response:
There was no place on the wireless survey to make a comment but rather just
answer the predefined questions, I wanted to comment that I will NOT have
wireless in the plant for reasons of operational security not related to
hacking.
ALL wireless signal generation can be jammed and as such provides an
unnecessary operational risk. To those that state spread spectrum is the
answer to jamming, they are totally wrong. Spread spectrum came about as a
means to make hacking increasingly difficult by rotating through a spectrum
of frequencies. The fabricators of spread spectrum did not see as a
technology that would or could overcome a spectrum jammer. A white noise
generator of sufficient power in the spectrum of the wireless devices can jam
ALL the frequencies used, leading to a total collapse of data from those
devices."
--
Kevin P. Inscoe Amateur Radio Call Sign: KE3VIN
Deltona, FL 32738 28.9497N by 81.1952W
kevin [at] inscoe [dot] org http://kevininscoe.com
GPG 0x61288D53
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